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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 30
• ### Table of contents

Publication Year: 2009, Page(s):C1 - C4
| PDF (51 KB)
• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2009, Page(s): C2
| PDF (43 KB)
• ### I/Q Imbalance Compensation Using a Nonlinear Modeling Approach

Publication Year: 2009, Page(s):513 - 518
Cited by:  Papers (48)  |  Patents (1)
| | PDF (686 KB) | HTML

In-phase/quadrature (I/Q) imbalance is one of the main sources of distortion in RF modulators. In this paper, a dual-input nonlinear model based on a real-valued Volterra series is proposed for compensation of the nonlinear frequency-dependent I/Q imbalance. First, different sources of distortion are identified from experimental measurements, then a dual-input nonlinear I/Q imbalance model is deve... View full abstract»

• ### Immittance and ${ S}$-Parameter-Based Criteria for the Unconditional Stability of Linear Two-Ports: Relations and Invariance Properties

Publication Year: 2009, Page(s):519 - 523
Cited by:  Papers (1)
| | PDF (272 KB) | HTML

Unconditional stability criteria for a linear two-port have been derived in the literature from the two-port immittance matrix (the Rollett approach), or from the S -parameters (as proposed by Kurokawa). In this paper, we stress some relations between the two strategies. First, we express the two- or single-condition stability criterion as a functions of immittances, and then we demonstrate... View full abstract»

• ### Analysis of Phase-Conjugating Arrays in Multipath Environments

Publication Year: 2009, Page(s):524 - 530
Cited by:  Papers (4)
| | PDF (862 KB) | HTML

The ability of a phase-conjugating array (PCA) to reduce fading in single-reflector, dual-reflector, and blocked-line-of-sight multipath environments is presented. Compared to a reference four-element antenna array, the PCA improves worst case signal fading by as much as 39 dB. Agreement between the experimental results and a ray-tracing model is observed, verifying the model as a viable method fo... View full abstract»

• ### A Planar Electronically Steerable Patch Array Using Tunable PRI/NRI Phase Shifters

Publication Year: 2009, Page(s):531 - 541
Cited by:  Papers (20)  |  Patents (1)
| | PDF (1753 KB) | HTML

This paper presents a planar electronically steerable series-fed patch array for 2.4-GHz industrial, scientific, and medical band applications. The proposed steerable array uses 0deg tunable positive/negative-refractive-index (PRI/NRI) phase shifters to center its radiation about the broadside direction and allow scanning in both directions off the broadside. Using the PRI/NRI phase shifters also ... View full abstract»

• ### Analysis, Design, and $X$-Band Implementation of a Self-Biased Active Feedback $G_{m}$ -Boosted Common-Gate CMOS LNA

Publication Year: 2009, Page(s):542 - 551
Cited by:  Papers (10)
| | PDF (588 KB) | HTML

This paper explores the use of active feedback to boost the transconductance of a common-gate (CG) low-noise amplifier and achieve simultaneous low noise and input power match. Unlike transformer coupled topologies, the CG input stage is dc-coupled to a self-biased common-source feedback amplifier (for gm boosting), thus eliminating the need of external bias circuitry. Noise and intermo... View full abstract»

• ### 2.4/5.7-GHz CMOS Dual-Band Low-IF Architecture Using Weaver–Hartley Image-Rejection Techniques

Publication Year: 2009, Page(s):552 - 561
Cited by:  Papers (15)
| | PDF (802 KB) | HTML

A 2.4/5.7-GHz dual-band Weaver-Hartley architecture, using 0.18-mum CMOS technology, is demonstrated in this paper. The 2.4-GHz signal is set to be the image signal when the desired signal is at 5.7 GHz, and vice versa. Since the Weaver and Hartley systems are combined into this architecture, the demonstrated architecture rejects not only the first image signal, but also the secondary image signal... View full abstract»

• ### Design and Analysis of a 0.8–77.5-GHz Ultra-Broadband Distributed Drain Mixer Using 0.13-$\mu$m CMOS Technology

Publication Year: 2009, Page(s):562 - 572
Cited by:  Papers (27)  |  Patents (1)
| | PDF (1634 KB) | HTML

A compact and broadband 0.8-77.5-GHz passive distributed drain mixer using standard 0.13-mum CMOS technology is presented in this paper. To extend the operation bandwidth, a uniform distributed topology is utilized for wideband matching. This paper also analyzes the device size and number of stages for the bandwidth of the CMOS distributed drain mixer. To optimize the conversion gain performance o... View full abstract»

• ### Digital Augmentation of RF Component Performance in Software-Defined Radio

Publication Year: 2009, Page(s):573 - 581
Cited by:  Papers (4)
| | PDF (366 KB) | HTML

This paper presents two tools for feedforward correction in transmitter chains in software-defined radio. The methods presume that the radio configuration already has a gate array and a mixer juxtaposed with one another. Programming is added in the gate array to affect preconditioning of the signals presented to in-phase and quadrature channels of a hybrid mixer so as to correct and enhance the an... View full abstract»

• ### Ultra-High Power and Efficiency Space Traveling-Wave Tube Amplifier Power Combiner With Reduced Size and Mass for NASA Missions

Publication Year: 2009, Page(s):582 - 588
Cited by:  Papers (13)
| | PDF (1166 KB) | HTML

In the 2008 IEEE Microwave Theory and Techniques Society International Microwave Symposium Digest version of our paper, recent advances in high power and efficiency space traveling-wave tube amplifiers for NASA's space-to-Earth communications are presented. The RF power and efficiency of a new K-band amplifier are 40 W and 50% and that of a new K-band amplifier are 200 W and 60%. An important figu... View full abstract»

• ### 2-D Acoustic Phase Imaging With Millimeter-Wave Radiation

Publication Year: 2009, Page(s):589 - 593
Cited by:  Papers (2)
| | PDF (1288 KB) | HTML

We report on 2-D acoustic phase imaging with millimeter-wave radiation for locating concealed objects. Active adaptation of the imaging interferometer provides enhanced images. We demonstrate that the method allows for finding metallic as well as dielectric materials. Even objects having similar optical properties as the background can be located. View full abstract»

• ### Eigenvalue Analysis of Curved Waveguides Employing an Orthogonal Curvilinear Frequency-Domain Finite-Difference Method

Publication Year: 2009, Page(s):594 - 611
Cited by:  Papers (8)
| | PDF (1774 KB) | HTML

An eigenvalue analysis numerical technique for curved closed waveguiding structures loaded with inhomogeneous and/or anisotropic materials is presented. For this purpose, a frequency-domain finite-difference method is developed for a general orthogonal curvilinear coordinate system. The main strength of the technique is the accurate modeling of curved transverse boundaries, as well as curved geome... View full abstract»

• ### A Complete Class of Harmonic Matching Networks: Synthesis and Application

Publication Year: 2009, Page(s):612 - 619
Cited by:  Papers (19)
| | PDF (1559 KB) | HTML

This paper presents a class of distributed element matching networks that is able to guarantee the required impedance values at fundamental frequency and its second and third harmonics. The synthesis formulas of each considered matching network are defined and reported. By using these formulas, the synthesis capability of all proposed structures are then investigated and compared. Successively, a ... View full abstract»

• ### Fast Passivity Enforcement of $S$-Parameter Macromodels by Pole Perturbation

Publication Year: 2009, Page(s):620 - 626
Cited by:  Papers (22)
| | PDF (1673 KB) | HTML

This paper presents a fast iterative algorithm for passivity enforcement of large nonpassive macromodels that share a common set of poles. It is ensured that the maximum passivity violation is monotonically decreasing in each iteration step, and convergence to a passive macromodel is guaranteed. View full abstract»

• ### A Spectral Transmission-Line Method for Computing Band Diagrams and Eigenmodes of Photonic-Bandgap Structures

Publication Year: 2009, Page(s):627 - 636
Cited by:  Papers (2)
| | PDF (594 KB) | HTML

A spectral transmission-line method (TLM) is developed for computing dispersion diagrams and eigenmodes of photonic-bandgap structures. By terminating the unit cell with periodic boundary conditions and allowing complex-valued voltages on the mesh, the system's modes may be found as solutions to an eigenvalue equation describing the system at steady state. A combination of sparse matrix techniques... View full abstract»

• ### A Fractional Boundary Placement Model Using the Transmission-Line Modeling (TLM) Method

Publication Year: 2009, Page(s):637 - 646
Cited by:  Papers (5)
| | PDF (336 KB) | HTML

A technique is described to allow the placement of boundaries at noninteger space step positions within the transmission-line modeling technique without compromising the simulation time step. The development of the 2-D and 3-D modeling procedure is described where the boundary is implemented in the connection process. A previously published technique based on inductive stubs is described and the f... View full abstract»

• ### A Compact Ridge-Waveguide Contiguous-Channel Frequency Multiplexer

Publication Year: 2009, Page(s):647 - 656
Cited by:  Papers (2)
| | PDF (1567 KB) | HTML

The experimental 4-6.25-GHz contiguous-channel frequency multiplexer being presented comprises three equal-bandwidth four-pole ridge-waveguide channel filters that are series-connected through a quasi-low-pass ridge-waveguide manifold. To minimize insertion loss, the multiplexer's port impedance-matching networks are also realized in ridge-waveguide, limiting the use of strip-type transmission lin... View full abstract»

• ### A Compact E-Shaped Patterned Ground Structure and Its Applications to Tunable Bandstop Resonator

Publication Year: 2009, Page(s):657 - 666
Cited by:  Papers (26)  |  Patents (1)
| | PDF (1306 KB) | HTML

In this paper, an E-shaped patterned ground microstrip bandstop resonant cell is proposed. In comparison to other bandstop resonators, it provides the advantages of a high-Q factor, and a sharp transition knee within a small circuit area. This resonant cell is applied to the design of a tunable bandstop resonator. Due to the unique E-shaped pattern etched in the ground plane, the proposed r... View full abstract»

• ### An Inline Coaxial Quasi-Elliptic Filter With Controllable Mixed Electric and Magnetic Coupling

Publication Year: 2009, Page(s):667 - 673
Cited by:  Papers (28)
| | PDF (952 KB) | HTML

Based on the concept of using controllable mixed electric and magnetic coupling to design planar filters in our earlier work, we propose a novel inline coaxial filter, in which the electric and magnetic coupling can be separately controlled. Due to this controllable mixed coupling, the filter can operate with a quasi-elliptic characteristic. By modifying resonator structure and inserting additiona... View full abstract»

• ### Substrate Integrated Waveguide Filter With Improved Stopband Performance for Satellite Ground Terminal

Publication Year: 2009, Page(s):674 - 683
Cited by:  Papers (51)
| | PDF (1832 KB) | HTML

In this paper, patent pending substrate integrated waveguide (SIW) bandpass filters with moderate fractional bandwidth and improved stopband performance are proposed and demonstrated for a Ka-band satellite ground terminal. Nonphysical cross-coupling provided by higher order modes in the oversized SIW cavities is used to generate the finite transmission zeros far away from the passband for improve... View full abstract»

• ### Synthesis Design of Ultra-Wideband Bandpass Filters With Composite Series and Shunt Stubs

Publication Year: 2009, Page(s):684 - 692
Cited by:  Papers (32)
| | PDF (705 KB) | HTML

This paper presents a direct synthesis procedure for efficient design of a class of ultra-wideband bandpass filters with composite series and shunt transmission-line stubs. The proposed single-stage bandpass prototype is formed by cascading two sets of series open-ended and shunt short-ended stubs through a multisection nonuniform transmission line. All the stubs are set with an identical electric... View full abstract»

• ### An Efficient Power-Delivery Method for the Design of the Power Distribution Networks for High-Speed Digital Systems

Publication Year: 2009, Page(s):693 - 707
Cited by:  Papers (8)
| | PDF (1890 KB) | HTML

In this paper, a new power distribution network (PDN) design method from a power delivery viewpoint is proposed. Two new parameters, the power delivery delay and the DeltaV time constant, are introduced to characterize the effects of the lead inductors and decoupling capacitors on the timely power delivery respectively for a high-speed PDN. The decoupling time of a PDN is accurately estimated from... View full abstract»

• ### Compact $S$ -/$Ka$-Band CMOS Quadrature Hybrids With High Phase Balance Based on Multilayer Transformer Over-Coupling Technique

Publication Year: 2009, Page(s):708 - 715
Cited by:  Papers (10)  |  Patents (2)
| | PDF (1912 KB) | HTML

This paper presents compact CMOS quadrature hybrids by using the transformer over-coupling technique to eliminate significant phase error in the presence of low-Q CMOS components. The technique includes the inductive and capacitive couplings, where the former is realized by employing a tightly inductive-coupled transformer and the latter by an additional capacitor across the transformer win... View full abstract»

• ### A Complete Noise- and Scattering-Parameters Test-Set

Publication Year: 2009, Page(s):716 - 724
Cited by:  Papers (6)
| | PDF (1231 KB) | HTML

We present an innovative test-set based on a microwave tuner, a vector network analyzer and a Y-factor receiver capable of extracting the noise and the scattering parameters of a two-port device. To the authors' knowledge, the presented test-set is the first noise system that avoids the use of any microwave switch in the noise measurement branches. A set of reflectometers and a novel calibr... View full abstract»

## Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt